/*
 *	Copyright (C) 2003-2006 Gabest
 *	http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#pragma once

#include "Exception.h"

namespace ssf
{
class Stream
{
public:
    enum {EOS = -1};
    enum encoding_t {none, unknown, utf8, utf16le, utf16be, wchar};

protected:
    int m_line, m_col;
    encoding_t m_encoding;

public:
    Stream();
    virtual ~Stream();

    static bool IsWhiteSpace(int c, LPCWSTR morechars = NULL);

    void ThrowError(LPCTSTR fmt, ...);
};

class InputStream : public Stream
{
    CAtlList<int> m_queue;
    int PushChar(), PopChar();

    int NextChar();

protected:
    virtual int NextByte() = 0;

public:
    InputStream();
    ~InputStream();

    int PeekChar(), GetChar();

    int SkipWhiteSpace(LPCWSTR morechars = NULL);
};

class FileInputStream : public InputStream
{
    FILE* m_file;

protected:
    int NextByte();

public:
    FileInputStream(const TCHAR* fn);
    ~FileInputStream();
};

class MemoryInputStream : public InputStream
{
    BYTE* m_pBytes;
    int m_pos, m_len;
    bool m_fFree;

protected:
    int NextByte();

public:
    MemoryInputStream(BYTE* pBytes, int len, bool fCopy, bool fFree);
    ~MemoryInputStream();
};

class WCharInputStream : public InputStream
{
    CStringW m_str;
    int m_pos;

protected:
    int NextByte();

public:
    WCharInputStream(CStringW str);
};

class OutputStream : public Stream
{
    bool m_bof;

protected:
    virtual void NextByte(int b) = 0;

public:
    OutputStream(encoding_t e);
    virtual ~OutputStream();

    void PutChar(WCHAR c);
    void PutString(LPCWSTR fmt, ...);
};

class WCharOutputStream : public OutputStream
{
    CStringW m_str;

protected:
    void NextByte(int b);

public:
    WCharOutputStream();

    const CStringW& GetString()
    {
        return m_str;
    }
};

class DebugOutputStream : public OutputStream
{
    CStringW m_str;

protected:
    void NextByte(int b);

public:
    DebugOutputStream();
    ~DebugOutputStream();
};
}